| # Banjo in drivers |
| |
| Devices may implement protocols, which are Banjo ABIs used by child devices |
| to interact with parent devices in a device-specific manner. The |
| [PCI Protocol](/sdk/banjo/fuchsia.hardware.pci/pci.fidl), |
| [USB Protocol](/sdk/banjo/fuchsia.hardware.usb/usb.fidl), |
| [Block Core Protocol](/sdk/banjo/fuchsia.hardware.block/block.fidl), and |
| [Ethernet Protocol](/sdk/banjo/fuchsia.hardware.ethernet/ethernet.fidl), are |
| examples of these. Protocols are usually in-process interactions between |
| devices in the same driver host, but in cases of driver isolation, they may take |
| place through RPC to another driver host (through proxy). |
| |
| See [Banjo Tutorial](/docs/development/drivers/tutorials/banjo-tutorial.md) to learn how to use Banjo. |
